PIC18LF56K42-I/PT - 64KB Flash 8-Bit MCU | Microchip | XLP 18K
MPN: PIC18LF56K42-I/PT ✓ Hoạt độngPIC18LF56K42-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), EEPROM for parameter storage, and configurable peripherals such as ADC, timers and communication interfaces on one silicon die. MCUs sit below microprocessors in system hierarchy and above discrete logic, serving as the embedded controller in everything from battery-powered sensors to industrial motor drives. The 8-bit PIC18 family uses a Harvard RISC architecture with hardware multiplier and 16-bit wide instruction paths for C-friendly code density.
Key features of the PIC18LF56K42 include the 12-bit ADC2 with up to 32 channels and oversampling, vectored interrupt controller with prioritised latency, peripheral DMA offloading core data movement, and the MAP (Memory Access Partition) feature for code protection and bootloader segmentation. The XLP (eXtreme Low Power) designation targets battery applications with sub-uA sleep currents.
The 48-pin TQFP-EP package exposes a thermal pad (EP) for low theta-JA and supports industrial temperature grade -40C to +85C. The part is suitable for IoT sensor nodes, low-power motor control and consumer appliances where extended battery life and integrated analog simplify BOM.
Designers should populate the exposed thermal pad with a continuous copper pour to dissipate transient loads, route VDD/VSS pairs as wide traces, and place the 0.1 uF + 1 uF decoupling network within 2 mm of each power pin.
This page synthesises distributor pricing, drop-in alternatives and practical design notes not found in the manufacturer datasheet alone, helping procurement and embedded engineers select the right MCU in a single view.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF56K42-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF56K42-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core, EEPROM, Program Memory (Flash).
PIC18F56K42-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF56K42T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF57K42-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF46K42-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF27K42-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF56K42-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit Harvard RISC) |
| Series | PIC XLP 18K (LF variant) |
| Tần số xung maksimum | 64 MHz |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| EEPROM | 256 B |
| Number of I/Os | 44 |
| ADC Resolution | 12-bit ADC2 |
| Điện áp cung cấp hoạt động | 1.8 V to 3.6 V |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 48-TQFP-EP (7x7 mm) |
| Kiểu lắp đặt | Surface Mount |
| Bề rộng đường dữ liệu | 8-bit |
| On-chip Peripherals | DMA, MAP, DIA, DAC, Comp, PWM |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF56K42-I/PT
| Chân 1 | RA0 — PORTA digital I/O / analog input |
| Chân 2 | RA1 — PORTA digital I/O / analog input |
| Chân 3 | RA2 — PORTA digital I/O / analog input |
| Chân 4 | RA3 — PORTA digital I/O / analog input |
| Chân 5 | RA4 — PORTA digital I/O / analog input |
| Chân 6 | RA5 — PORTA digital I/O / analog input |
| Chân 7 | RA6 — PORTA digital I/O / analog input |
| Chân 8 | RA7 — PORTA digital I/O / analog input |
| Chân 9 | VSS — Ground reference |
| Chân 10 | RB0 — PORTB digital I/O / analog input |
| Chân 11 | RB1 — PORTB digital I/O / analog input |
| Chân 12 | RB2 — PORTB digital I/O / analog input |
| Chân 13 | RB3 — PORTB digital I/O / analog input |
| Chân 14 | RB4 — PORTB digital I/O / analog input |
| Chân 15 | RB5 — PORTB digital I/O / analog input |
| Chân 16 | RB6 — PORTB digital I/O / analog input |
| Chân 17 | RB7 — PORTB digital I/O / analog input |
| Chân 18 | VSS — Ground reference |
| Chân 19 | RC0 — PORTC digital I/O |
| Chân 20 | RC1 — PORTC digital I/O |
| Chân 21 | RC2 — PORTC digital I/O |
| Chân 22 | RC3 — PORTC digital I/O |
| Chân 23 | RC4 — PORTC digital I/O |
| Chân 24 | RC5 — PORTC digital I/O |
| Chân 25 | RC6 — PORTC digital I/O |
| Chân 26 | RC7 — PORTC digital I/O |
| Chân 27 | VSS — Ground reference |
| Chân 28 | RD0 — PORTD digital I/O |
| Chân 29 | RD1 — PORTD digital I/O |
| Chân 30 | RD2 — PORTD digital I/O |
| Chân 31 | RD3 — PORTD digital I/O |
| Chân 32 | RD4 — PORTD digital I/O |
| Chân 33 | RD5 — PORTD digital I/O |
| Chân 34 | RD6 — PORTD digital I/O |
| Chân 35 | RD7 — PORTD digital I/O |
| Chân 36 | VSS — Ground reference |
| Chân 37 | RE0 — PORTE digital I/O |
| Chân 38 | RE1 — PORTE digital I/O |
| Chân 39 | RE2 — PORTE digital I/O |
| Chân 40 | RE3 — PORTE digital I/O |
| Chân 41 | VDD — Positive supply voltage |
| Chân 42 | VDD — Positive supply voltage |
| Chân 43 | RF0 — PORTF digital I/O / analog input |
| Chân 44 | RF1 — PORTF digital I/O / analog input |
| Chân 45 | RF2 — PORTF digital I/O / analog input |
| Chân 46 | RF3 — PORTF digital I/O / analog input |
| Chân 47 | RF4 — PORTF digital I/O / analog input |
| Chân 48 | RF5 — PORTF digital I/O / analog input |
Ứng dụng tiêu biểu
PIC18LF56K42-I/PT phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Nodes, Industrial Sensor Signal Conditioning, Low-Power Motor Control (BLDC / Stepper), Consumer Appliance User Interface, Smart Home and Connected Lighting, Medical Wearable Monitoring.
Battery-Powered IoT Sensor Nodes
The PIC18LF56K42-I/PT is well matched to battery-powered IoT sensor nodes because its XLP (eXtreme Low Power) design achieves Deep Sleep currents below 100 nA with the RTC running, while still exposing a 12-bit ADC2 with DMA that can wake the core only when a sensor threshold is exceeded. At 64 MHz the LF variant draws under 8 mA active, so a typical 2400 mAh AA cell lasts years in duty-cycled wireless sensor duty. The 64 KB Flash accommodates a small LoRaWAN, BLE stack or proprietary Sub-GHz link layer without external memory.
Được đề xuất
Industrial Sensor Signal Conditioning
In industrial 4 mA to 20 mA loop-powered sensor conditioning, the PIC18LF56K42-I/PT delivers the 12-bit ADC2 with built-in oversampling to push effective resolution above 14 bits for RTD, thermocouple and bridge readouts. Its 44 I/O accommodate keypad, LCD bias generation, HART or RS-485 interface and watchdog supervisor wiring. The -40C to +85C industrial temperature grade plus DMA offload let the core stay asleep while ADC samples accumulate, reducing self-heating in tightly sealed field instrument enclosures.
Được đề xuất
Low-Power Motor Control (BLDC / Stepper)
The PIC18LF56K42-I/PT is a strong fit for small brushless DC and stepper motor controllers, integrating up to four PWM channels with complementary outputs, dead-band generators and fault shut-down inputs. The 64 MHz core closes the FOC current loop in tens of microseconds, while the 12-bit ADC2 samples back-EMF or shunt voltage synchronously to the PWM centre. The 48-TQFP-EP thermal pad dissipates the MCU's own losses so the PCB doubles as a heatsink for the FET bridge.
Được đề xuất
Consumer Appliance User Interface
For white-goods and small kitchen appliances, the PIC18LF56K42-I/PT drives 7-segment or character LCDs, capacitive touch buttons and triac-based AC loads using its high-current sink I/O. The 256-byte EEPROM stores user-setpoints and fault logs across power cycles, while MAP (Memory Access Partition) protects the calibration block from accidental firmware overwrites. The XLP sleep current under 100 nA keeps standby power consumption below the 0.5 W EU eco-design threshold.
Được đề xuất
Smart Home and Connected Lighting
Smart-home hubs and connected LED drivers use the PIC18LF56K42-I/PT as the application controller that bridges low-power wireless modules with dimming PWM and DALI bus interfaces. The DMA channels move DMX/DALI frames between UART and PWM peripherals without CPU intervention, leaving cycles for HTTPS-over-Wi-Fi coordination on a co-processor. With 1.8 V to 3.6 V operation the MCU co-exists with the latest 1.8 V radio SoCs on a single rail without level shifters.
Được đề xuất
Medical Wearable Monitoring
Wearable health patches leverage the PIC18LF56K42-I/PT to sample pulse oximetry, ECG or skin-temperature channels with the 12-bit ADC2, then store trend data in the 4 KB RAM before BLE bursts. Deep Sleep at roughly 50 nA with RTC running lets a 3 V coin cell sustain continuous monitoring for weeks, and the -40C to +85C rating covers skin-mount and cold-storage use cases. Hardware DMA reduces the time spent in active mode, indirectly extending battery life between charges.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF56K42-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F56K42-I/PT | PIC18LF56K42T-I/PT | PIC18LF57K42-I/PT | PIC18LF46K42-I/PT | PIC18LF27K42-I/SS |
|---|---|---|---|---|---|---|
| Package | 48-TQFP-EP (7x7 mm) | 48-TQFP-EP - same | 48-TQFP-EP - same | 48-TQFP-EP - same | 40-TQFP | 28-SSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 64 KB | 64 KB | 64 KB | 128 KB | 64 KB | 128 KB |
| Operating Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| I/O Count | 44 | 44 | 44 | 44 | 36 | 23 |
| ADC | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB |
Bảo phân biệt quan trọng
- XLP deep-sleep below 100 nA with RTC running (vsPIC18LF27K42-I/SS)
- 48-pin TQFP-EP with 44 I/O for richer peripherals (vsPIC18LF46K42-I/PT)
- Same pinout as F variant for supply-rail migration (vsPIC18F56K42-I/PT)
Ghi chú thiết kế
Place a 1 uF ceramic decoupling capacitor within 2 mm of each VDD/VDDCORE pin pair (pins 41, 42 on the TQFP-EP) and a 0.1 uF high-frequency bypass on the same side of the PCB. The PIC18LF56K42-I/PT draws brief inrush currents when the ADC2 or DMA engines start; clustering the capacitors prevents the rail collapsing and corrupting ADC readings in battery-powered designs where the source impedance is high.
Solder the exposed thermal pad (EP) on the underside of the 48-TQFP-EP to a continuous ground pour of at least 25 mm x 25 mm of 1 oz copper. Although the LF part rarely dissipates more than 30 mW, the EP also acts as the primary electrical return path for the silicon substrate; failing to stitch the pad with multiple thermal vias can raise junction temperature 10 C to 15 C above the 25 C ambient reference, triggering ADC self-heating drift.
Route the HFOSC clock trace to the crystal or external oscillator with a guard trace tied to ground, and keep the trace shorter than 5 mm to avoid ringing at 64 MHz. The ICSP/PGD and PGC pins (typically RA0/RA1 in TQFP-EP) should be brought out to an in-circuit programming header without series resistors, since Microchip's MPLAB Snap and ICD 4 programmers expect direct access during debug.
Do not exceed 3.6 V on VDD or leave VDD floating during power-up sequencing; the LF process lacks 5 V tolerance and will latch-up. Likewise, do not drive an analog pin above VDD + 0.3 V - the ADC2 front-end clamps internally but persistent over-voltage degrades the input leakage spec. If you must interface 5 V signals, route them through the PIC18F56K42-I/PT variant instead, which shares the same pinout but tolerates 5 V analog inputs.
Thông tin tuân thủ
Industrial temperature grade only (-40C to +85C); AEC-Q100 qualified variants are listed separately under the PIC18F56K42-E/PT or PIC18LF56K42-E/PT suffixes. RoHS compliant per Microchip product page.